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6.4.4. Registering Advanced Externalizers

In JBoss Data Grid, AdvancedExternalizer implementation can be registered using XML or Programmatic configuration, or via annotation.
An Advanced Externalizer implementation for Person object stored as a static inner class can be configured programmatically or declaratively.
Declarative Configuration:

The following is an example of a declarative configuration for an advanced Externalizer implementation: 

<infinispan>
  <global>
    <serialization>
      <advancedExternalizers>
        <advancedExternalizer externalizerClass="Person$PersonExternalizer"/>
      </advancedExternalizers>
    </serialization>
  </global>
  ...
</infinispan>
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Programmatic Configuration:

The following is an example of a programmatic configuration for an advanced Externalizer implementation: 

GlobalConfigurationBuilder builder = ...
builder.serialization()
   .addAdvancedExternalizer(new Person.PersonExternalizer());
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An AdvancedExternalizer implementation must be associated with an identifier, regardless of the configuration method used.
If an identifier in an AdvancedExternalizer implementation is defined using both XML/Programmatic configuration as well as annotation, XML/Programmatic defined value will be used.
The following example shows an Externalizer where the identifier is defined at the time of registration:
Declarative Configuration:

The following is a declarative configuration for the location of the identifier definition during registration: 

<infinispan>
  <global>
    <serialization>
      <advancedExternalizers>
        <advancedExternalizer id="123"
                              externalizerClass="Person$PersonExternalizer"/>
      </advancedExternalizers>
    </serialization>
  </global>
  ...
</infinispan>
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Programmatic Configuration:

The following is a programmatic configuration for the location of the identifier definition during registration: 

GlobalConfigurationBuilder builder = ...
builder.serialization()
   .addAdvancedExternalizer(123, new Person.PersonExternalizer());
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